Keep author-set schema titles and accept Tag objects on operations

[tymondesigns]

Summary

Implements OA-1 and OA-2 from the OpenAPI 3.1 porting feedback. JSON Schema items (JS-*) are out of scope.

OA-1 — Keep deliberate titles when embedding a JsonSchema

BuildsArray::unwrapValue() always passed includeTitle: false, which dropped both factory/constructor titles and titles set with ->title().

cortexphp/json-schema 1.3.0 already distinguishes them: getInitialTitle() is the constructor argument and getTitle() is the current value. They differ only when the author called ->title() with a different string.

Embedding now:

• strips $schema (unchanged)
• strips constructor/factory titles on inline schemas (unchanged)
• keeps a title when getTitle() !== null && getTitle() !== getInitialTitle()

Reproductions from the feedback:

MediaType::json()->schema(Schema::object('Consult')->title('consults'))->toArray();
// schema.title is "consults"

Parameter::query('when')->schema(Schema::string('IsoDateTime'))->toArray();
// schema has no title

OA-2 — Operation::tags() accepts Tag|string

Callers that already hold a Tag no longer need ->getName(). String tags remain valid.

$operation->tags(Tag::create('Users'));
$operation->tags('Users');
$operation->tags(Tag::create('Users'), 'Admin');

Other

One-line Rector cleanup on Response::$description so composer format:check passes with the current Rector version.

Test plan

• Pest (192 tests)
• PHPStan level 10
• Type coverage 100%
• composer format:check (Rector + ECS)
• CI on this PR